Starting with 16.0.13707.20008 (ProPlus, Win10 Preview) in the first half of January, build updates involve much more downloading and thus time than they ever had before in my years of updating Office C2R builds.
After this happened with several updates in a row over a few weeks, I measured what was downloaded each time: around 3.4GB. That's basically the entire client, as if I'd installed from scratch.
What happened to smart, differential-style updating?
I happen to have a way to see what the bandwidth was historically (earlier months) for these updates: roughly half what they are now, consistently.
So I tested on another PC: also about twice what it should be.
The "Host Process for Windows Services," which is what does the downloading from what I can tell, just isn't as efficient as it used to be, but why?
